I am replacing some valves and hoses in both heads on my Bav 44. It seems that the current arrangement uses two diverter valves and multiple hoses in a rather complicated fashion to get the job done.
Attached is a picture showing the current configuration on the right. On the left, is what I think is a much less complicated routing. It doesn't need any valves at all. The only downside I see is that the hose from the head to the tank will always have something in it, which can flow backwards through the joker valve (if it is not in top condition).
Are all Bavarias plumbed like this? By the way, both heads are done in the same manner.
Jake